Black, brown, and blue all combine with area rugs

Accent color for dark brown carpet and black furniture?

Blue is a great accent color for dark brown and black, and so is red. Go for a sea blue or a steel blue rather than a baby blue, and the combo will look great. You can also add small touches of ivory to it, and it will pull the colors together.

For example, you could lighten up your flooring with an area rug like this Mystique Area Rug. On your bed, choose a blue/ivory duvet or comforter. Pottery barn has a great selection of duvet covers.

On your walls, add pictures with black frames. If you can paint the walls, try one feature wall in dark blue and the rest in a shade two tones lighter.